This study aims to evaluate the safety status of electrical installations in residential and commercial buildings within the Suame ECG strategic business unit, Ghana, focusing on compliance with international and Ghan...This study aims to evaluate the safety status of electrical installations in residential and commercial buildings within the Suame ECG strategic business unit, Ghana, focusing on compliance with international and Ghanaian wiring standards. The research assesses key factors influencing safety, including the certification of electricians, the quality of cable brands used, proper cable sizing, adherence to wiring color codes, the awareness and use of Residual Current Circuit Breakers (RCCBs), and the protection of earth electrodes. A descriptive research design was utilized, involving extensive field surveys and electrical installation audits. Data were collected using standardized tools and analyzed with SPSS software to evaluate the professional competencies of artisans and their adherence to safety standards. The findings indicate significant safety risks, with 69.7% of electricians lacking proper certification, leading to the widespread use of non-approved cable brands, improper cable sizing, and deviations from wiring color codes. Additionally, deficiencies were found in the awareness and use of RCCBs and the protection of earth electrodes. The study concludes with recommendations to enhance electrical safety, including mandatory certification for electricians, public awareness campaigns, regular inspections, and ongoing training and development programs. These measures are crucial for improving the overall safety and quality of electrical installations in the Suame area, Ghana.展开更多
高压直流断路器(high voltage direct current circuit breaker,HVDC CB)是构建直流电网的核心元件。能量吸收支路(energy absorption path,EAP)因具有吸收剩余能量,抑制过电压等作用,成为HVDCCB中必不可少的部分。以EAP所处HVDCCB类型...高压直流断路器(high voltage direct current circuit breaker,HVDC CB)是构建直流电网的核心元件。能量吸收支路(energy absorption path,EAP)因具有吸收剩余能量,抑制过电压等作用,成为HVDCCB中必不可少的部分。以EAP所处HVDCCB类型的不同为依据,对国内外已有研究进行归纳整理,进而探究EAP能量吸收的特性;并对3种不同类型HVDCCB中EAP的能量吸收过程进行仿真分析和横向对比。同时,针对EAP设计中吸能元件具备的辅助功能,即限压、限流功能和时序控制功能,分别进行阐述,并验证其有效性。最后,以直流电网为应用场景,介绍了2类不同形态HVDC CB中的EAP设计。在总结现有EAP的设计方法的基础上,指出设计发展的瓶颈,并对未来研究趋势进行展望。展开更多
文摘This study aims to evaluate the safety status of electrical installations in residential and commercial buildings within the Suame ECG strategic business unit, Ghana, focusing on compliance with international and Ghanaian wiring standards. The research assesses key factors influencing safety, including the certification of electricians, the quality of cable brands used, proper cable sizing, adherence to wiring color codes, the awareness and use of Residual Current Circuit Breakers (RCCBs), and the protection of earth electrodes. A descriptive research design was utilized, involving extensive field surveys and electrical installation audits. Data were collected using standardized tools and analyzed with SPSS software to evaluate the professional competencies of artisans and their adherence to safety standards. The findings indicate significant safety risks, with 69.7% of electricians lacking proper certification, leading to the widespread use of non-approved cable brands, improper cable sizing, and deviations from wiring color codes. Additionally, deficiencies were found in the awareness and use of RCCBs and the protection of earth electrodes. The study concludes with recommendations to enhance electrical safety, including mandatory certification for electricians, public awareness campaigns, regular inspections, and ongoing training and development programs. These measures are crucial for improving the overall safety and quality of electrical installations in the Suame area, Ghana.
文摘高压直流断路器(high voltage direct current circuit breaker,HVDC CB)是构建直流电网的核心元件。能量吸收支路(energy absorption path,EAP)因具有吸收剩余能量,抑制过电压等作用,成为HVDCCB中必不可少的部分。以EAP所处HVDCCB类型的不同为依据,对国内外已有研究进行归纳整理,进而探究EAP能量吸收的特性;并对3种不同类型HVDCCB中EAP的能量吸收过程进行仿真分析和横向对比。同时,针对EAP设计中吸能元件具备的辅助功能,即限压、限流功能和时序控制功能,分别进行阐述,并验证其有效性。最后,以直流电网为应用场景,介绍了2类不同形态HVDC CB中的EAP设计。在总结现有EAP的设计方法的基础上,指出设计发展的瓶颈,并对未来研究趋势进行展望。
